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RN,IRONMeN'I'.AL WFAUT.YRPURT AHUe NUUM ARYSTRONU-RANCH ReVIaRU panlet <br />szrruu11RR inn SANTA ANA, CALIYURNIA <br />2:12` <br />`IOISE <br />New <br />No subumatlal <br />Would the project resirlt in; <br />signifimm <br />NI.,r S—twre Cbnuge from <br />mq,ua. <br />IMPnrl V,evw. Anny.is <br />(a). <br />Exposure of persons to orgeneiation oraokelevels in exceas of <br />standards established in the local geiieraiPlan or noise o6flin2iice, <br />❑ <br />❑ <br />oral licablestandankofothera cncicsl <br />(b) <br />Exposure of personsto or generation ofexcessivcgroundborne <br />oraroundborne noise levels? <br />ED <br />Elvibration <br />(c) <br />A substantial permanent increase in ambient noise levels in the <br />project vicinity above levels existing wit}tout the proimt? <br />❑ <br />❑ <br />(d) <br />A substantial temporary or periodic increase in ambient noise <br />levels in the Peojecl vicinity above levels existing without the <br />❑ <br />❑ <br />project? <br />(e) <br />For a project located within'an airport land use'plan or, where sudi <br />a plan has not been a(iopted,- ,within two miles ofapublic airport or <br />use airport, would the project expilse people residing or. <br />0 <br />- <br />1:1public <br />workin -in ilio ra'c�:i arca to ezeu�vsive noise levels2. <br />Analysis of Project Changes; <br />a) Two types orshort Cerin noise impacts could occur duringcomstntction of the Revised Project. <br />First, the construction crewoi» mutes and lhu transport of construction t quipment and materials <br />to the site foi the Revised Project would incrementally increase noise levels on access roads <br />leading to the Project site. The second type of short-term nowise impact is related to noise <br />generated during demolition, site preparation, grading, building construction, architectural <br />coating, and paving on the Project site. It is anticipated that noise impacts to surrounding <br />sensitive receptors would be. potentially significant. The Revised Project would be required to <br />comply with Mitigation Measure NOH from the Certified MR, which requires compliance with <br />the City's noise ordinance, muffling ofcoastruction equipment, coordinationwith neighbors W <br />resolve noise complaints, and eohstntction of a temporary noise barrier around rite [ roject site. <br />1mPlemcntatioh of Mitigation' Measure NOl-t would reduce noise impacts during construction of <br />the Revised Project to it loss than significant.level. <br />Long-term noise from the Rcvised.Project would include on-site and off-site noise impacts from <br />Project -related traffic on roadways adjacent to the Project site,noise from on-site mechanical <br />equipment, and noise from on -silo human aclNiLy. A substrimiat noise impact would occur if the <br />Revised Project increased noise levels increase by 3 A -weighted decibels (dBA) or more, The <br />Approved Project found that trafhc noise would increascmoise levels by 1.1 dBA which is <br />substantially below the noisc.threshold ofan increase of 3.0 dBA, which is barely perceptible to <br />the human car. As discussed in Section 2.15, Transportation/traffic, the Revised Project would <br />generate fewer trartic trips compared to the land uses proposed for the Approved Project; <br />therefore; trafficnoisc impacts of the Revisal Project would be less than the Approved Project <br />and would therefore be less than significant. Similar to the Approved Project, the residential units <br />would include air conditioning acid heating units.'llie mechanical equipment for heating and air <br />would be shielded from the adjacent homes and'school and would not be anticipated to exceed <br />City noise standards. Similar to the Approved Project, on site noise from human activity such as <br />people talkiti„ doors shimming, tires squealing, heck deliveries; landscape maintenance, <br />1`aS I10160dL\J�I�durnlAdllrndum.wrs .•VIiQS!I T <br />75B-102 <br />2-53 <br />